Henderson started slowly, but scored 19 points after halftime. He made a crucial 3-pointer midway through overtime that gave the Rebels (11-5, 2-1 Southeastern Conference) a 76-69 lead.

Ole Miss went on an 11-0 run to start overtime for an insurmountable 80-69 lead. Sebastian Saiz added a career-high 20 points.

Andre Stringer scored 23 points for LSU (10-5, 1-2). He led a Tigers bench that combined for 40 points.

Summers hit a 15-foot jumper with 30 seconds remaining in regulation to tie the game at 69. LSU's Anthony Hickey missed a jumper with 4 seconds left in regulation that would have won the game.

Ole Miss has won six of the last seven against LSU.

Henderson missed the Auburn and Mississippi State games because of a suspension announced in October for poor on- and off-the-court behavior stemming from last season. He was excellent in his return, making 6 of 12 shots from 3-point range.

LSU jumped out to an early 14-6 lead, and the Rebels' lethargic play combined with some unfriendly whistles from the officials drew the wrath of Ole Miss coach Andy Kennedy.

He earned a rare technical foul after Demarco Cox was called for a foul, and the Rebels responded to Kennedy's scathing sideline commentary with a 25-11 run over the next 10 minutes. Ole Miss led 35-32 at halftime.

The 6-foot-9, 233-pound Saiz was dominant in the first half, playing his best basketball of the season. He was 6 of 7 for 12 points, finishing on an array of dunks and smooth moves by the rim.

LSU countered with Stringer, who scored 10 points in the first half. Then the 5-foot-10 guard -- a Jackson, Miss., native -- single-handedly helped the Tigers leap past the Rebels early in the second half by making three 3-pointers in less than 2 minutes.

The only thing that could stop Stringer was foul trouble. He picked up his fourth with 13 minutes remaining in the game and had to go to the bench.

The game stayed tight throughout the entire second half. LSU had a slim lead most of the time, but Henderson hit a contested 3-pointer -- while being fouled -- and finished the four-point play to push the Rebels ahead 62-61 with 4:45 remaining.

But LSU kept getting big offensive rebounds down the stretch and led 67-62 with 2:21 remaining. Ole Miss rallied, using Summers' clutch jumper to force overtime.

In overtime, it was all Ole Miss. LSU didn't score for nearly 4 minutes as the Rebels coasted to the win.